Type of Street
|
Cartway3 With
Curbs
(feet)
|
Cartway2 No Curbs
(feet)
|
Right-of-Way
(feet)
|
Shoulders
(feet)
| |
---|---|---|---|---|---|
Cul-de-sac1
|
24*
|
20
|
50
|
4
| |
Minor/local
|
24*
|
20
|
50
|
4
| |
Collector
|
36
|
22
|
60
|
8
| |
Industrial/commercial
|
36
|
28
|
60
|
8
| |
Arterial
|
As prescribed by the Pennsylvania Department of Transportation's
Design Standard
|
NOTES:
| ||
---|---|---|
1Residential; other culs-de-sac follow
other commercial or industrial standards.
| ||
2Requires shoulders.
| ||
3Wedge curbs are required; shoulders
are not required.
| ||
*Two twelve-foot traffic lanes.
|
To determine the classification of a residential street, the
following two tables shall be used as a guide:
|
Projected Daily Traffic Volume (ADT)*
| ||
---|---|---|
Street Classification
|
Volume
| |
Cul-de-sac
|
0-250
| |
Minor/local
|
0-1,000
| |
Collector
|
1,000-3,000*
|
Source: Table 2-1, Residential Streets, 2nd edition, American
Society of Civil Engineers, National Association of Home Builders,
Urban Land Institute
|
Residential Trip Generation Rates Daily Vehicle Trips
Per Dwelling Unit*
| ||||
---|---|---|---|---|
Type
|
Weekday
|
Peak Hour
| ||
Single-family detached Apartments
|
10.0
|
1.0
| ||
All
|
6.0
|
0.7
| ||
Low-rise
|
7.0
|
0.7
| ||
High-rise
|
4.0
|
0.4
| ||
Townhouse and single-family condominiums
|
6.0
|
0.6
|
Source: Table 2-2, Residential Streets, 2nd edition, American
Society of Civil Engineers, National Association of Home Builders,
Urban Land Institute (figures rounded)
|
NOTES:
| ||
---|---|---|
*The Township will accept updated traffic generation data from
such sources as the Trip Generation Manual of the Institute of Transportation
Engineers.
|
Note: In the event the projected volume of a street exceeds 3,000 vehicles per day, then its design shall be based upon current PennDOT or other accepted engineering standards but in no event shall be less than the standards for a collector, as shown in § 185-28A.
|
Table A
Design Criteria for Streets1
(Not to Include Intersections)
Type of Street
| |||||
---|---|---|---|---|---|
Item
|
Comm./Ind.
|
Collector
|
Minor/Local
|
Cul-De-Sac4
| |
Maximum grade2
|
6.0%
|
6.0%
|
12.0%
|
10.0%
| |
Minimum grade
|
1.0%
|
1.0%
|
1.0%
|
1.0%
| |
Minimum center-line radius
|
500 feet
|
500 feet
|
250 feet
|
250 feet
| |
Minimum sight distance3
|
300 feet
|
300 feet
|
250 feet
|
250 feet
| |
Tangent between curves
|
150 feet
|
150 feet
|
100 feet
|
100 feet
|
NOTES:
| ||
---|---|---|
1For arterial roads, PennDOT standards
will apply.
| ||
2Grades in excess of the allowable
percentage may be approved by the Township where it is clear that
it is necessary and that no traffic hazard is or will be created thereby.
| ||
3Sight distance shall be measured
along the center line of the street between points where a driver's
eyes at three feet six inches in height can see an object six inches
high. Values shown are minimums. Greater values may be required depending
on site-specific criteria.
| ||
4Please see cul-de-sac definition;
a cul-de-sac is the entire street, not merely the vehicular turnaround.
|